Musnad Ahmad 30:2933

'Abd al-Rahman narrated to us, he said: Shu'bah narrated to us, from Muhammad ibn Ziyad, he said: I heard Abu Hurayrah narrating from the Prophet, peace and blessings of Allah be upon him, who said: "If the Ansar were to travel through a valley—or a mountain pass—I would travel through the valley of the Ansar—or their mountain pass. And were it not for the Hijrah, I would have been a man from among the Ansar." Abu Hurayrah said: "And he did not wrong [them], may my father and mother be sacrificed for him; they sheltered him and supported him, or they comforted him and supported him."